Sets up and operates one or more electrical-discharge machines to shape metal workpieces to
specifications, following standard charts and manuals, and applying knowledge of
electrical-discharge machining processes and methods, electric currents and circuitry, metal
properties, and shop mathematics: Examines blueprint of product and plans operations. Positions and
secures workpiece on machine table with clamps, vise, or fixture. Positions and secures electrode in
holder on surface plate, verifying concentricity, alignment, and depth, using measuring instruments,
such as calipers and dial indicators. Mounts electrode and holder on machine spindle, using vernier
dials on machine to verify alignment of electrode and workpiece. Positions gauge blocks, dial
indicator, and spindle stop on machine so that descending electrode will stop at specified depth
when indicator feeler point touches gauge blocks. Turns valve to adjust flow of dielectric coolant
over electrode and workpiece or to immerse them in circulating bath. Turns controls to adjust
machine setting, such as voltage, current, frequency, and electrode feed rate, according to
information on charts or knowledge of electrical discharge machining procedures. Starts machine and
observes beginning of operation. May move controls to rotate electrode or workpiece. May inspect
completed workpiece visually and with templates and other measuring instruments. May compute
settings from specifications and knowledge of machine capacities. May give TOOL MAKER (machine shop)
601.280-042 specifications, such as allowances between blueprint dimensions and dimensions of
electrode to be made. Important variables may be indicated by trade names of machine used.
GOE: 06.01.03 STRENGTH: L GED: R4 M4 L4 SVP: 7 DLU: 77

Sets up and operates one or more electrical-discharge machines to shape metal workpieces to
specifications, following standard charts and manuals, and applying knowledge of
electrical-discharge machining processes and methods, electric currents and circuitry, metal
properties, and shop mathematics: Examines blueprint of product and plans operations. Positions and
secures workpiece on machine table with clamps, vise, or fixture. Positions and secures electrode in
holder on surface plate, verifying concentricity, alignment, and depth, using measuring instruments,
such as calipers and dial indicators. Mounts electrode and holder on machine spindle, using vernier
dials on machine to verify alignment of electrode and workpiece. Positions gauge blocks, dial
indicator, and spindle stop on machine so that descending electrode will stop at specified depth
when indicator feeler point touches gauge blocks. Turns valve to adjust flow of dielectric coolant
over electrode and workpiece or to immerse them in circulating bath. Turns controls to adjust
machine setting, such as voltage, current, frequency, and electrode feed rate, according to
information on charts or knowledge of electrical discharge machining procedures. Starts machine and
observes beginning of operation. May move controls to rotate electrode or workpiece. May inspect
completed workpiece visually and with templates and other measuring instruments. May compute
settings from specifications and knowledge of machine capacities. May give TOOL MAKER (machine shop)
601.280-042 specifications, such as allowances between blueprint dimensions and dimensions of
electrode to be made. Important variables may be indicated by trade names of machine used.
GOE: 06.01.03 STRENGTH: L GED: R4 M4 L4 SVP: 7 DLU: 77